Polarisation-preserving photon frequency conversion from a trapped-ion-compatible wavelength to the telecom C-band
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We demonstrate polarisation-preserving frequency conversion of single-photon-level light at 854 nm, resonant with a trapped-ion transition and qubit, to the 1550-nm telecom C band. A total photon in / fiber-coupled photon out efficiency of ∼ 30% is achie... ...
